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Photoelectric gas analyser with tunable laser radiation source - has radiation passing through test gas sample to detector feeding logarithmic signal processing circuit
Photoelectric gas analyser with tunable laser radiation source - has radiation passing through test gas sample to detector feeding logarithmic signal processing circuit
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机译：具有可调激光辐射源的光电气体分析仪-辐射穿过测试气体样品到达检测器，并提供对数信号处理电路
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摘要
The signal output of the detector is connected to a logarithmic network. At any time interval in which the laser frequency changes in a frequency band outside and in the region of the absorption line the time control unit switches the output of the logarithmic network to a channel with integrating and holding circuits. The output signal of the analyser is formed by forming the difference of the stored values. A beam splitter produces a reference beam path and a motorised diaphragm alternately frees the two beam paths which are united again into one beam path by a beam fusion device in front of the receiver.
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